11.3 Test 1 Computer Practice

11.3 Test 1 Computer Practice - order local 1 2 3 4 5 6 7 8...

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Unformatted text preview: order local 1 2 3 4 5 6 7 8 9 10 11 chain 15.7 20 17.4 16.3 13.4 18 16.8 21.4 20.7 17.1 14.4 17.2 21.1 19.3 15.3 15.6 19.3 18.8 20.4 19.1 16.3 15.8 A. You order pizza from a local pizza place and your roommate orders from a nat delivery, you each order a pepperoni pizza from your respective company at t of two months and record how long it takes to be delivered. Can you conclud is faster at delivery on average than the national chain at the 8% significance Paired T-­‐Test and CI: local, chain Paired T for local -­‐ chain N Mean StDev SE Mean local 11 17.382 2.521 0.760 chain 11 18.018 2.050 0.618 Difference 11 -­‐0.636 1.425 0.430 95% upper bound for mean difference: 0.142 T-­‐Test of mean difference = 0 (vs < 0): T-­‐Value = -­‐1.48 P-­‐Value = 0.08 B. Construct a 90% confidence interval for the mean difference in delivery time b national chain. Interpret your answer. 90% CI for mean difference: (-­‐1.415, 0.142) We are 90% confident in the method used the mean difference in delivery tim national chain falls between -­‐1.415 and 0.142 minutes. ur roommate orders from a national chain. To test who is faster at m your respective company at the same time over the course be delivered. Can you conclude that your local joint al chain at the 8% significance level? T-­‐Value = -­‐1.48 P-­‐Value = 0.085 an difference in delivery time between the local place and the mean difference in delivery time between the local place and the ...
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  • Spring '13
  • Leffakis
  • 8%, 90%, 0.142  minutes, 0.636    1.425        0.430 95%, 1 2 3 4 5 6 7 8 9 10 11 chain, 11    17.382    2.521        0.760 chain

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